Improved street-sweeper



2 SheetsSheet '1.

J. W. MCDONALD. STREET SWEEPER.

No. 88,194. Patented Mar. 23, 1869.

n NORRIS PETERS co. PHoTouma. WASHINGTON ay 0.

2 Sheets-Sheet 2. J. W. MGDONALD.

STREET SWEEPER.

N0. 88,194. Patented Mar. 23, 1869.

Sweepers stat JAMES W. M DONALD, OF CHICAGO, ILLINOIS. Letters Patent No. 88,194, dated March 23, 1869.

IMPROVED smear-Swansea.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern.-

Be it known that I, JAMES W'. MCDONALD, of Ohicago, in the county of Cook, and State of Illinois, have invented a new and useful Improvement in Streetand I do hereby declare the following to be a full, clear, and exact description. of the same, reference being bad to the accompanying drawings, and the letters and figures marked thereon, which form a part of this specification, and in which- Figure 1 represeutsa side elevation of myimproved sweeper.

Figure 2, a vertical sectional view, and

Figure 3, a plan view of the same, with the top removed, and with one wheel cut away at the top to' show the inside.

The nature of my invention consists in the special construction of a broom, or sweeping-cylinder, which causes it to sweep the soil and debris to the centre thereof; also, in the hinged incline, and the trough that receives the soil and debris,- and It further consists in the screw for conveying the soil to and the mode of adjustment of the elevator.

. To enable those skilhrl in the art to understand how to manufacture and use my invention, I 'will proceed to describe the same with particularity.

The same letters of reference refer to the corresponding parts in the different figures.

A represents a box, which is supported on the axle B of the wheel 0.

There are also upon the same axle, two large gearwheels D D, which are driven from the drive-wheel O by means of the pawls E, which are so arranged that they engage in the cogs H, on the inside of the rim of the wheels D, and drive them when the machine moves forward, but they slip over the cogs H,'wheu the machine is moved backwards, and have the effect of the machine :being' thrown out of gear.

The pawls Ejhave a thumb-piece, F, attached to them, by which they can be turned up so as not to engage in the notches, or cogs H, when desired.

The cogs, or teeth I, on the periphery of the gearwheels 1), engage with the pinions J, on the broomsha-it K, and communicate, the power that does the sweeping.

The broom-shaft K has hearings in the movable blocks L, and is suspended from the arms M on the shaft N, by the chains 0. It is suspended in this way, so that it may be raised and lowered as desired; but the bearing-blocks L are so arranged in the side of the box A, that the pinions J are carried so as toengage with the teethl, whatever the hei ht of the shaft K.

The shaft N is revolved so as to raise the broomshaft K, by inserting a lever in the holesshown in the end-piece P of said shaft, and it is held in any desired position by the ratchet-lever Q.

The brooms- S are attached to the shaft K, in spiral rows, and are so arranged that the ends of the rows, at the end of the sharia, strike the street first, each row winding back on the shaft from the end thereof, as shown in fig. 3,.50 that the middle of the row strikes the street last. By this construction of thesweeper, the soil is swept towards the middle of the box A.

The brooms sweep the soil up". the incline T, into the trough U, and said incline,"'T, is hinged to the shaft R, at the edge of the trough, and extends back partly under the sweeper, as shown, being suspended therefrom by the chain V, so that the rear edge of it is raised and lowered with the broom-cylinder, but, at the. same time, will yield to any obstacle in the bed .of the street. j

The shaft X has a right and-left screw-conveyor,- Y, upon it,-for conveying the soil from each end of the trough to the centre thereof; and there are also on said shaft two toothed wheels Z, for carrying the endless-chain-elevator A. r

The shaft X is driven by pinions on the end thereof, engaging with the cogs B, on the drive-wheels 1), beneath the rim which has the cogs I.

There is also a shaft, 0', across the top of the elevating-spout D, which has adjustable bearings, E,

which are raised and lowered by the nuts F on the- It will be seen that I. not, only sweep the soil from the street, but I elevate it into carts, ready to be hauled away, thereby saving the labor, in street-clean ing, of many men.

Having thus fully described the construction and operation of my invention,

What I claim, and desire to secure by Letters Patent, is-

' 1. The sweeping-cylinder, when the brooms are ar ranged thereon in a spiral" form, substantially as and for the purposes described.

2. The combination of the shaft R with theinclinc T, screw-conveyor Y, and troughU, in a street-sweeping machine, when constructed andarranged substantially as and for the purposes specified.

3. The combination of the trough U, screw-conveyor Y, and endless-chainconveyer A when constructed and arranged substantially as described.

4. The blocks L, when suspended. on the chains 0, in combination with the pinion J and cogs I of wheel 0, all constructed and arranged substantially as herein specified.

5. The combination-0f the screwrod H, with the ad justable bearings, E, when raisedand lowered by means of nuts 11", all constructed and arranged in a streetsweeping machine, substantially as specified.

' JAMES W. MCDONALD.

Witnesses:

THOMAS GnnswELL, WILLIAM H. SMITH. 

